Perpetual calendar assembly



July 9, 1963 s. F. ELWOOD 3,096,595

PERPETUAL CALENDAR ASSEMBLY Filed Aug. 50. 1960 2 Sheets-Sheet 1 Sam E Hwood INVENTOR.

BY in? July 9, 1963 s. F. ELWOOD 3,096,

PERPETUAL CALENDAR ASSEMBLY Filed Aug. 50, 1960 2 Sheets-Sheet 2 CEN TUR 1E5 8am E Elwood INVENTOR.

BY @Maflan WWW United States Patent 3,096,595 PERPETUAL CALENDAR ASSEMBLY Sam F. Elwood, P.0. Box 2612, Sacramento, Calif. Filed Aug. 30, 1960, Ser. No. 52,860 2 Claims. (Cl. 40-107) The present invention generally relates to a perpetual calendar assembly and more particularly to such an assembly for providing a calendar for each month of each year from the year 1753, the first whole year following the last adjustment of the calendar in October 1752, until the next adjustment is made in the calendar which should not be necessary for several thousand years. While only centuries are covered in the tabulator, the fact that the calendar repeats every 400 years make its range into the future practically unlimited.

The primary object of the present invention is to provide an assembly conveniently disposed Within a housing .having an inclined display surface thereon generally in the form of a recess for receiving a calendar card having the days of a particular month arranged thereon so that there will be provided a calendar for each month of each year.

Another object of the present invention is to provide a tabulator device for indicating which calendar card will be displayed for each month.

Yet another feature of the present invention is to provide a device as described in the preceding objects having means therein for storing the unused calendar cards and also means for setting and displaying the month and year immediately above the calendar card recess for convenience of reading.

Yet another feature of the present invention is to provide a novel tabulator construction including a plurality of superimposed rotatable disks each'including handle means on the periphery thereof for easily rotating the disk for designating the particular calendar card to be employed for a particular month and year.

Other objects of the present invention will reside in its simplicity of construction, ease of operation, accuracy, facility in use and its generally inexpensive manufacturing cost.

These together with other objects and advantages which Will become. subsequently apparent reside in the details of construction and operation as more fully hereinafter described and claimed, reference being had to the accompanying drawings forming a part hereof, wherein like numerals refer to like parts throughout, and in which:

FIGURE 1 is a perspective view of the cabinet of the present invention including the various elements of the assembly disposed therein;

, FIGURE 2 is a detailed longitudinal sectional view taken substantially upon a plane passing along section line 2-2 of FIGURE 1 illustrating the construction of the cabinet;

FIGURE 3 is a schematic view illustrating one of the calendar cards together with its association with the sliding pointer mounted on the cabinet;

FIGURE 4 is a plan view of the tabulator;

FIGURE 5 is a plan View of the one year disk;

FIGURE 6 is a plan view of the decades disk;

FIGURE 7 is a plan view of the centuries disk;

FIGURE 8 is a plan View of the months disk;

FIGURE 9 is a transverse sectional view taken substantially upon a plane passing along section line 9-9 of FIGURE 4 illustrating the assembled construction of the tabulator; 7 FIGURE 10 is "a detailed sectional view taken substantially upon a plane passing along section line 10-10 of FIGURE 6 illustrating the details of construction of the decade disk.

3,096,595 Patented July 9, 1963 Referring now specifically to the drawings, the numeral 10 generally designates a cabinet which receives parts of the calendar assembly and forms a part of the calendar assembly. :The cabinet 10 includes a top wall 12, a front wall 14, and a rear wall 16, a bottom 18, a side wall 20, and a side wall 22, all of which are interconnected to form a hollow enclosure. The front wall 14 is lower in height than the rear Wall 16 and the top wall 12 is shorter in length than the bottom 18. Interconnecting the top edge of the front wall 14 and the top wall 12 is an inclined wall 24 having a recess formed therein. The recess is designated by the numeral 26 and is generally rectangular in configuration for receiving a selected one of a group of calendar cards. The calendar car-d is designated by numeral 28 and will be received withinthe recess 26. The bottom edge of the recess 26 is provided with an inwardly extending flange or lip 30 which forms generally a channel 32 for receiving the bottom edge of the calendar card 28 when it is inserted into the recess 26. In View of the inclined construction of the wall 24, the calendar card 28 will be in position for ready observation.

Disposed immediately above the recess 26 is a transverse rectangular slot or opening 34 that has a series of aligned rollers disposed thereunder including a month roller 35 and three year rollers 36, 37 and 38 mounted under the slot. A knob 39 is connected with the roller 35 for adjusting the month, a knob 40 is connected With the roller 36 for varying the centuries, a knob 41 is connected with the roller 37 for varying the decades, and a knob 42 is connected with the roller 38'for varying the single years. The knobs 39-42 are knurled for ease of rotation. of the rollers 3538. It ispointed out that the knobs are connected with their rollers by an inner shaft 43 extending to the inner of the rollers and an outer sleeve 44 extending to the outer of the rollers with this structure being repeated on each side of the cabinet. The rollers have suitable indicia thereon for indicating the months, centuries, decades and single years and the friction of the disks or rollers will be sufficient to retain them in position.

Also disposed on the wall 24 is a bracket 46 receiving an arrow-type slide 48 thereon for indicating Leap Year and Regular Year printed on wall 24.

The bottom portion of the front wall 14 is provided with a slot-like opening 50 slidably receiving a drawer 52 having a handle 54 thereon. The drawer 52 is slidable on the bottom 18 of the cabinet which is recessed above the bottom edge of the cabinet and supported at the rear end by an inturned flange 56. The drawer 52 is rather shallow and is for the purpose of receiving a tabulator generally designated by numeral 58 which forms part of the assembly of the present invention and has for its purpose the indication of a proper calendar card 28 to be employed for a particular month and year.

The side wall 22 is provided with an enlarged rectangular opening 60 receiving a sliding drawer 62 having a handle 64 thereon with the drawer being slidable on a bottom partition 66 and retained in position by a vertical partition 68. The drawer 62 receives a plurality of calendar cards 28 which are supported on edge somewhat in the nature of index cards in a filing cabinet. Thus, when the drawer 62 is pulled laterally outwardly, the calendar cards 28 may be observed and the desired card removed and placed in the recess 26.

Each calendar card 28 has an indicia thereon designated by numeral 70 which indicates the days of the month which are arranged in the usual manner of a calendar and each card 28 is also provided with indicia arrow 48.

3 There will be 18 calendar cards or plates indexed as follows:

4 Cards Index "A for January ONE SIDE OPP. SIDE AO-AL1 A4AL5 Monday Fri. A1AL2 A5AL6 Tues. Sat. A2AL3 A6-ALO Wed. Sun. A3AL4 Blank Thur.

7 Cards Index B for February ONE SIDE OPP. SIDE BMon. BLOSun. Bl-Tues. BLl-Mou. BZ-Wed. BL2-Tues. B3-Thur. BL3-Wed. B4-Fri. BL4--Thur. B5Sat. BL5Fri. B6Sun. BL6-Sat.

7 Cards Index C and for All Months Except January and February: C Cards or Plates for All 31 Day Months Except January: D Plates for All 30 Day Months.

ONE SIDE OPP. SIDE C0--CLO D0--DLO Mon. Mon. C1CL1 D1DL1 Tues. Tues. C2-CL2 D2--DL2 Wed. Wed. C3CL3 D3-DL3 Thur. Thur. C4-CL4 D4-DL4 Fri. Fri. C5-CL5 DSDL5 Sat. Sat. C6-CL6 D6-DL6 Sun. Sun.

In the above instances, the day of the week designated is the day of the week on which the first of the month falls. The indicia 72 constitutes index letter or letters together with a number and the tabulator 58 is employed for designating which card 28 is to be employed and the arrow 48 is moved to the left for regular years and to the right to leap years and the words Regular Year and Leap Year are printed on the exterior face of the housing.

FIGURES 4-10 illustrate the details of construction of the tabulator generally designated by the numeral 58 and this includes a backing or mounting plate 74 having an upwardly extending pin or bolt 76 mounted therein. The backing plate 74 may take any configuration and may be of any suitable material and of a size to fit within the drawer 52.

Disposed in superimposed relation to the mounting or backing plate 74 is a plurality of disks including a circular disk 78 which is a month disk and which includes a radial lug 80 extending from the periphery thereof with the lug being provided with a handle which extends upwardly therefrom. Disposed on the surface of the disk 78 which faces upwardly is indicia 82 designating the months of the year from January through December. Oriented on the opposite side of the disk is numerical indicia 84 adjacent the external surface thereof and alphabetical letters 86 disposed radially inwardly from the peripheral edge thereof. The indicia 82, 84 and 86 all are arranged circumferentially and are circumferentially spaced about the center of rotation of the disk 78.

Disposed in overlying relation to the month disk 78 is the century disk 88 which is basically circular but provided with a radial offset circumferential portion 90 at one side thereof. Adjacent one side of the periphery of the disk 88 is numerical indicia 92 indicating the centuries. At the outer edge of the radially offset portion a numerical indicia 94 is provided on the periphery thereof and an arcuate slot 96 is provided in spaced relation to the periphery of the disk and is disposed between the center of the disk and the indicia 94. A letter 98 is disposed adjacent the slot 96 and there is a radially extending tab 100 with a handle 102 thereon extending from the portion 90 of the disk 88.

Superimposed on the disk 88 is a decade disk 104 which is also generally circular but has an offset outwardly extending portion 106. On the periphery of the circular portion of the disk 104 is numerical indicia 108 and opposite from the indicia 108 the disk 104 is provided with an arcuate slot 110 and numerical indicia 112 at the periphery thereof. Disposed intermediate the indicia 112 and the slot 110 and closer to the slot 110, there is provided letter indicia in the form of the letter L designated by reference numeral 114. Also, there is an opening 116 in the disk 104 adjacent the end edge of the slot 110 and radially inwardly from the arcuate path of the letter indicia 114.

Disposed in superimposed relation to the offset portion 106 of the disk 104 is a masking plate 118 having a plurality of arcuate rows of openings 120. The inner row of openings overlies and reveals the indicia 114 and there is also provided an enlarged opening 122 in registry with the opening 116 in the disk 104 and also extending across the arcuate area in which the indicia 114 lies. Extending radially outwardly from the disk 104 is a handle or radial tab 124 habing an upstanding handle 126 thereon. The inner edge portion of the masking plate 118 is free, that is, not attached to the disk 104 while the other edge portion thereof is attached. Also, the outer edge portion of the masking plate is provided with notches 128 formed therein.

Overlying the decade disk 104 is a single year or one year disk 130 which is also substantially cylindrical but is provided with a slightly offset portion 132 which is received under the masking plate 118. The one year disk is provided with numerical indicia 134 about the periphery of the circular portion and also indicia 136 about the periphery of the offset portion. There are actually four rows of indicia 136 with the outer two rows being numerical and the inner two rows being in the form of the letter L. This disk 130 is also provided with an arcuate slot 138 and an enlargde opening 140 of the same size as the opening 122 and the disk 104. A radially extending handle 142 is provided adjacent the circular portion and the handle is provided with an upstanding lug or handle member 144 thereon.

Overlying all of the disks is a cover plate 146 retained in position by a fastening nut or the like 148 and the periphery of the disk 146 is provided with a plurality of arcuate notches designated by numerals 150, 152, 154 and 156 which receive and form limits for the lugs or handles 80, 102, 126 and 144. The ends of the notches form limits or abutments for the respective handles and limit the rotational movement of the disk. Also, the cover plate 146 is provided with a slot 158 for revealing the month indicia 82 thereunder, a slot 160 alongside the slot 158 for revealing the century, decade and single year indicia thereunder, that is, indicia 92, 108 and 134. Disposed diametrically opposite to the slots 158' is a pair of slots 162 and 164 with the slots 162 being relatively short for revealing the indicia 86 therethrough and the slot 164 being relatively long for revealing both index or letter indicia together with a numerical indicia indicating which card is to be employed.

In the illustration of FIGURE 4, the disks have been rotated and adjusted so that the desired month and year,

April 1960, are observed through the windows 158 and 160. This is accomplished by moving the handle 80 until April is revealed through the window 158' and the century handle 102 is rotated until 19 is revealed through the window 160 and the decade handle 126 and year handle 144 are moved to show the numenal 60 through the window 160. When this has been accomplished, the indicia appearing through windows 162 and 164 is re vealed and it is pointed out that the letters D and L are revealed along with the numerals 5 and 6. The D represents the index letter while the L indicates a leap year and the numerals 5 and 6 are employed to determine which card is to be employed. The numeral figures 5 and 6 appearing in the tabs are all added together or totaled. From this total subtract the multiples of 7 with the remainder then giving the index card number. In the example illustrated in the drawings, the firs-t letter is D which will be the index letter of the card. The numeral tab numbers add up to l l. Since 7 will go into 11 only once, 7 is subtracted from 11 leaving a remainder of 4 which is the index tab number of the card. Thus, the calendar card having indicia DL'4 at the upper edge thereof will be removed from the drawer and placed in the recess in the cabinet and the year and month will be oriented in the opening 34 thereby forming a calendar for a particular month. As indicated, the first day of April 1960 was on Friday.

The letter L in the tabs denotes leap year. For example, January 2000, when dialed on the tabulator, would have the tabs registered AL6. Since the letter A is the index letter and the numeral 6 is not divisible by 7, then the card indicia for this month and year would be AL6. Referring to indicia AL6 on page 7 it will be seen that for this indicia the first of the month is on Saturday. When July 1960 is dialed on the tabulator, the tabs will appear as follows: CL5-6. The letter C is the index letter and the numerals 5 and 6 total 1 1 and by subtracting 7, the remainder is 4 and thus, the index indicia is GL4. Referring to indicia CL4 on page 7 it will be seen that for this indicia the first of the month is on Friday.

The day of the week for any given date can be ascertained by using the tabulator and without using the calendar cards or plates. This is accomplished by dialing the desired month and year on the tabulator. Then add the numeral value of the tabs to the desired day of the month. Subtract l for the months of January or February of any leap year and then subtract the multiples of 7 with the remainder of this mathematical calculation being the number of the day with being Sunday, 1 being Monday, etc. through to 6 being Saturday. For example, if it is desired to determine the day of the week of January l, 1960, January 1960 is dialed on the tabulator. This will reveal ALS. By adding the tabs, the result is plus the day of the month gives the total of 6. Since this is not a multiple of 7, then it is only necessary to subtract 1 from 6 since January 1960 is in a leap year. This leaves a remainder of 5 which indicates the day of the week as being Friday. Another example is September 5, 1955. When September 1955 is dialed, the tabs are D6-6-5. In adding the tabs plus 5 for the day of the month, the total is 22. Subtracting the multiples of 7 or 21 from 22 leaves a remainder of 1 which indicates that September 5, 1955 fell on Monday. By following this procedure, the day of the week for any given day may be easily determined by a relatively simple mathematical computation without resorting to the calendar cards. However, the calendar cards are desir able when it is desired to repeatedly refer to a particular month in a particular year for some particular reason.

The foregoing is considered as illustrative only of the principles of the invention. Further, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the invention to the exact construction and operation shown and described, and accordingly, all suitable modifications and equivalents may be resorted to, falling within the scope of the invention as claimed.

What is claimed as new is as follows:

1. A tabulator for indicating selective calendar cards comprising a plurality of superimposed rotatable disks, each of said disks having a handle thereon, a bottom plate with bolt means thereon for retaining the disks in assembled relation, and a cover plate overlying all of the disks, said cover plate having peripheral notches thereon receiving the handles and limiting the movement of the disks, said disks being four in number with one of the disks being a month disk, one being a year disk, one being a decade disk and one being a century disk for indicating a month and year date, said cover plate having a slot-like opening -for revealing the dialed month and year date, said disks also having indicia thereon for registry with each other when dialing the month and year date for indicating the calendar card to be employed for that particular month and year, said cover plate also having a slot-like opening revealing the indicia designating the calendar card to be employed.

2. In a calendar assembly, a plurality of calendar cards, each of said calendar cards having identifying indicia thereon, a tabu-lator having indicia thereon for selectively indicating the calendar card to be employed depending upon the date to be observed, said tabulator including a plurality of superimposed rotatable disks, each of said disks having a handle thereon, a bottom plate, means rotatably retaining the disks in assembled relation, and a cover plate overlying all of the disks, said cover plate having peripheral notches therein receiving the handles and limiting the movement of the disks, said disks being four in number with one of the disks being a month disk, one being a year disk, one being a decade disk, one being a century disk for indicating a month and year date, said cover plate having a slot-like opening for revealing the dialed month and year date, said disks also having indicia thereon corresponding to the identifying indicia on the cards for registry with each other when dialing the month and year date for indicating the calendar card to be employed for that particular month and year, said cover plate also having a slot-like opening revealing the indicia designating the calendar card to be employed for that month and year.

References Cited in the file of this patent UNITED STATES PATENTS 455,648 Weaver July 7, 1891 685,476 Huston Oct. 29, 1901 1,740,479 Coleman Dec. 24, 1929 1,810, 153 Aker June 16, 193 1 2,110,668 Janssen Mar. 8, 1938 2,588,795 Bauer Mar. 11, 1952 FOREIGN PATENTS 316,630 Great Britain Aug. 2, 1929 

2. IN A CALENDAR ASSEMBLY, A PLURALITY OF CALENDAR CARDS, EACH OF SAID CALENDAR CARDS HAVING IDENTIFYING INDICIA THEREON, A TABULATOR HAVING INDICIA THEREON FOR SELECTIVELY INDICATING THE CALENDAR CARD TO BE EMPLOYED DEPENDING UPON THE DATE TO BE OBSERVED, SAID TABULATOR INCLUDING A PLURALITY OF SUPERIMPOSED ROTATABLE DISKS, EACH OF SAID DISKS HAVING A HANDLE THEREON, A BOTTOM PLATE, MEANS ROTATABLY RETAINING THE DISKS IN ASSEMBLED RELATION, ANDA COVER PLATE OVERLYING ALL OF THE DISKS, SAID COVER PLATE HAVING PERIPHERAL NOTCHES THEREIN RECEIVING THE HANDLES AND LIMITING THE MOVEMENT OF THE DISKS, SAID DISKS BEING FOUR IN NUMBER WITH ONE OF THE DISKS BEING A MONTH DISK, ONE BEING A YERA DISK, ONE BEING A DECADE DISK, ONE BEING A CENTURY DISK FOR INDICATING A MONTH AND YEAR DATE, SAID COVER PLATE HAVING A SLOT-LIKE OPENING FOR REVEALING THE DIALED MONTH AND YEAR DATE, SAID DISKS ALSO HAVING INDICIA THEREON CAORRESPONDING TO THE IDENTIFYING INDICIA ON THE CARDS FOR REGISTRY WITH EACH OTHER WHEN DIALING THE MONTH AND YEAR DATE FOR INDICATING THE CALENDAR CARD TO BE EMPLOYED FOR THAT PARTICULAR MONTH AND YEAR, SAID COVER PLATE ALSO HAVING A SLOT-LIKE OPENING REVEALING THE INDICIA DESIGNATING THE CALENDAR CARD TO BE EMPLOYED FOR THAT MONTH AND YEAR. 